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I've done low-level work in C++ with SCATS, about a decade ago. It was a challenging API to work with, not fully documented and a lot of strange timing "phenomena".

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SCATS was originally based on LSI-11 (pizza-box sized PDP-11) hardware. I wouldn't be surprised if considerable legacy code still lurks in there. Don't know what the current hardware is - hope it's not Windows 3.11 PCs. (Don't laugh, a few years ago I was working with ATMs for a large bank, inside the ATMs were beige PCs running Windows 3.11).

Lots of the screenshots in the article show the software running on XP.

Interesting - could you explain more about the strange phenomena and lack of documentation?

I've heard there is still present issues with lack of documentation, and more experienced folk having left the development team.

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